Hyundai Ioniq (AE): Crankcase Emission Control System / Repair procedures

Inspection
1.
After disconnecting the vapor hose from the PCV valve, remove the PCV valve.
2.
Reconnect the PCV valve to the vapor hose.
3.
Run the engine at idle, then put a finger over the open end of the PCV valve and make sure that intake manifold vacuum can be felt.
   
•
The plunger inside the PCV valve will move back and forth at vacuum.

4.
If the vacuum is not felt inspect PCV operation, if operating correctly clean or replace the vapor hose.

    Schematic Diagram

    Operation Principle

    Other information:

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Evaporator Temperature Sensor. Description and operation

    DescriptionThe evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC).

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: General safety information and caution

    Safety PrecautionPrecautions To Take Before Servicing High Voltage System    â€¢ Since hybrid vehicles contain a high voltage battery, if the high voltage system or vehicles are handled incorrectly, this might lead to a serious accidents like electric shock and electric leakage.

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